Kiro has five tiers: Free 50 credits, Pro $20/1,000, Pro+ $40/2,000, Pro Max $100/5,000, and Power $200/10,000, with add-on credits at $0.04. Auto mode mixes models to cut cost (the same task costs 1.3x credits via Sonnet), and the spec-driven flow turns vibe coding into traceable, structured development.
A comparison of six agent CLI subscriptions (Claude Code, Cursor CLI, Codex, Kiro, Antigravity/Gemini CLI, OpenCode) plus the multi-model routing pattern — cheap models for simple work, strong models for hard work. Nearly every one of these changed its billing in the first half of 2026; this version was re-verified on 8/18.
Agent CLIs are not smarter autocomplete tools -- they are AI agents that can read your codebase, execute multi-step tasks, and operate in real environments. Claude Code, Codex CLI, Gemini CLI, OpenCode, Aider, Pi, Kiro, Amp, Cursor CLI... the tools keep multiplying, but they all share a common set of design principles -- understanding these principles is how you actually get good at using them.